After the surgery and the cross-border transport, a cryonics patient arrives at the least dramatic-looking part of the whole enterprise: a building that, from the outside, could pass for a warehouse with an unusual ventilation system. That ordinariness is the point. The storage phase has to last not for a treatment cycle but for decades, possibly centuries, and the design problem is no longer biology. It is institutional and geological survival. Tomorrow.bio stores its patients at the European Biostasis Foundation (EBF), a non-profit, in an underground facility in Rafz, Switzerland.
Two questions are worth taking seriously here: why this country, and what such a facility actually has to do. Both answers are about stability over very long time horizons, which is a different engineering target than anything earlier in the procedure.
Switzerland is a bet on boring stability
The choice of Switzerland is not sentiment; it is risk minimization across several independent axes that all have to hold for a long time.
Security and stability. Switzerland is among Europe's most stable countries, politically, financially, and socially. For a facility that must keep operating long after everyone who built it is gone, low volatility is worth more than any feature you could add to the building.
Mission integrity. Operating as a non-profit under Swiss law makes the organization's mission very hard, in practice close to impossible, to quietly redirect. That legal rigidity is a feature, not a constraint: it is what stops a future board from deciding that storing patients is no longer the point. The question of what happens if the provider fails gets a real structural answer precisely because storage sits inside a non-profit built to outlive its founders.
Environmental security. Geographically, Switzerland carries minimal risk of natural disasters, which matters enormously for something you intend to leave undisturbed for a century. Fewer earthquakes, floods, and storms means fewer ways for the outside world to reach in.
What the facility is actually for
As the name says, the job is to store cryopreserved patients indefinitely. In practice that means human bodies, or in the case of neuro patients just the brain, held inside specialized cryogenic dewars. Patients are kept either fully submerged in liquid nitrogen at -196°C, or in the vapor phase at around -140°C using Intermediate Temperature Storage systems, with the same goal in both cases: hold the cell structure still until, and if, future revival becomes possible.
A patient only reaches this point after the earlier stages have done their work. Following legal death and stabilization, the body is cooled and perfused with cryoprotectants in the surgical phase, and only once temperature is low enough and perfusion is complete is the patient transported to long-term storage. These facilities are deliberately built in regions with little to no natural-catastrophe risk and in legal environments favorable to human cryopreservation, because prolonged safety is the entire value proposition. Tomorrow.bio's patients rest at the EBF facility in Rafz.
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The quiet genius is needing almost nothing
What makes a storage facility special is not its appearance but its independence from things that fail. The dewars hold patients at -196°C using nothing but a boiling liquid and good insulation, with no compressor and no reliance on the electrical grid. A mechanical freezer dies the moment the power does; a dewar of liquid nitrogen simply needs topping up as the nitrogen slowly boils away. The facility's real work is monitoring, refilling, security, and continuity, the unglamorous maintenance of a system designed so that the laws of thermodynamics, rather than a machine someone has to keep running, do the preservation. The specific engineering of those vessels is covered in classic cryogenic storage dewars and the case for the EBF site in the Swiss facility that convinced the skeptics.
The hardest problem in long-term storage is not staying cold; it is staying boring, funded, and intact for a hundred years, which is why the answer is a non-profit under Swiss law and not a clever machine.